<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>

</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class Parent extends React.Component {
            state = {
                car: "八手奥拓"
            }

            render() {
                const { car } = this.state
                return (
                    <div>
                        <h1>我是父组件</h1>
                        <p>我开的车是{car}</p>
                        <hr />
                        <button onClick={this.changeCarHandle}>修改</button>
                        <hr />
                        <Child a={1} car={car} />
                    </div>

                )
            }
            changeCarHandle = () => {
                this.setState({
                    car: "奥迪RS7"
                })
            }
        }
        class Child extends React.Component {

            render() {
                console.log("child组件实例", this);
               let { car } = this.props;
                car = "粉色的"+car
                return (
                    <p>我是儿子组件 我开我老子的车{car}</p>
                )
            }
        }
        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(<Parent />)
    </script>
</body>

</html>